Fault Finding; Grundfos Alarms And Warnings - Grundfos IO Instrucciones De Instalación Y Funcionamiento

7. Fault finding

7.1 Grundfos alarms and warnings

The Grundfos alarms and warnings that may appear in the system are divided into two sections:
• System alarms and warnings
• Pump alarms and warnings.
7.1.1 System alarms and warnings
Code System events
3 General-purpose alarm
Communication fault,
10
pump
25 Setup conflict
191 High-level alarm
236 Pump 1 fault
237 Pump 2 fault
238 Pump 3 fault
239 Pump 4 fault
7.1.2 Pump alarms and warnings
Code Pump events
Phase sequence
9
reversed
32 Overvoltage
40 Undervoltage
48 Overload
57 Dry running
Motor temperature
65
(Pt1000)
Temperature, control
66
electronics
Thermal switch 1 in
69
motor
Thermal switch 2 in
70
motor
Verification error, code
82
area (ROM)
Verification error,
83 parameter area
(EEPROM)
191 High-level alarm
26
Description
The input for external alarm is
activated.
The internal communication
between the CIU unit and one or
more pumps has failed.
Two or more pumps have the same
internal GENIbus address.
The high-level alarm has been
triggered.
One of the faults in section
7.1.2 Pump alarms and warnings
has occurred.
Description
The pump cannot start due to wrong phase
sequence (two phases interchanged).
The supply voltage to the pump exceeds the
limit stated on the nameplate (+ 20 %).
The supply voltage to the pump is below the
limit stated on the nameplate (- 15 %).
Motor or pump is overloaded. The motor
2
protection (I t) has tripped.
The dry-running sensor has been activated.
The Pt1000 sensor has triggered the alarm
relay. Fault code 65 is disabled as default.
The NTC sensor has triggered the alarm relay.
Fault code 66 is disabled as default.
Thermal switch 1 open (150 °C).
Thermal switch 2 open (160 °C, single-phase,
170° C, three-phase).
ROM content validation failed.
EEPROM content validation failed.
The water level has exceeded the limit set as
"High water level".
LED1 Alarm Warning
1 pulse ●
2 pulses ●
3 pulses ●
4 pulses ●
5 pulses ●
6 pulses ●
7 pulses ●
8 pulses ●
Alarm Warning
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